Influence of selenium on lead absorption and localization in meristematic cells of Allium sativum L. and Pisum sativum L. roots

• Autorzy: Glinska S. , Gabara B.
• Języki publikacji: EN

Abstrakty

EN

The effect of different concentrations (80-640 µM) of sodium selenate and sodium selenite on lead absorption by Allium sativum (selenium absorber) and Pisum sativum (selenium nonaccumulator) roots treated with 10 µM Pb(NO3)2 was investigated. Lead alone and with either of the selenium compounds was supplied in aqueous solutions for 24 h. Selenite diminished lead content in the two plant species’ roots more effectively than selenate. The rhodizonate method showed the absence of lead in the presence of only 160 µM sodium selenite and only 640 µM sodium selenate. The effects of selenium compounds at 80 µM concentration on lead localization in meristematic cells were also investigated. While selenite in garlic cells reduced the number of electron-dense deposits in the cell wall and diminished their size in vacuoles, it increased their number in cytoplasm and plastids, and enlarged them in mitochondria. In pea cells it caused the disappearance of electron-dense sediments from the Golgi apparatus, endoplasmic reticulum, vacuoles and nucleus, or reduced their number in mitochondria, cytoplasm and plastids (lack of large deposits). On the basis of literature data we assume that selenium reduces the lead concentration in Allium sativum and Pisum sativum roots due to the formation of Pb-Se complex in the incubation medium.

Słowa kluczowe

EN

cytochemistry; plant cytology; cell; lead absorption; meristem; selenium compound; localization; selenium; Allium sativum; root; Pisum sativum

• Wydawca: -
• Czasopismo: Acta Biologica Cracoviensia. Series Botanica
• Rocznik: 2002
• Tom: 44
• Opis fizyczny: p.39-48,fig.,ref.

Twórcy

autor

Glinska S.

• University of Lodz, Banacha 12-16, 90-237 Lodz, Poland

autor

Gabara B.

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